Shouldn’t be excluding admins the loop passes the arg ‘exclude_admins_mods=0’ ‘0’ being ‘false’ so it’s defaulting to showing group admin/mods you would need to specifically filter them out with ‘1’

No there is no group admin avatar function, but if you wanted to show an avatar to denote a person is a group admin it shouldn’t be too hard to do by checking if user is bp_group_is_admin() and if true calling your own link to an uploaded image in the media library